Patent GB-708309-A (GB)
Title: Hydrocarbon oils containing halogen-containing polycarboxylates
IPC: C10M171/00
Filed: 1951-10-15
Abstract: The invention comprises hydrocarbon oils containing, as foam-inhibitors, polyhalocarboxylates of the general formula <FORM:0708309/IV (a)/1> in which X is hydrogen, chlorine, or bromine, only one X being hydrogen, R is hydrogen or methyl, Y is alkyl or alkoxyalkyl of 1-8 carbon atoms, and n is an integer of 10-50.  The polyhalocarboxylates may have a molecular weight of 2,000-10,000, they may be present in an amount up to 0.1 per cent. by weight, and a detersive additive and an extreme-pressure additive may also be present (see Group III).  The polyhalocarboxylates are obtained by contacting a haloform or a carbon tetrahalide with an acrylate or methacrylate containing the group-COOY or a mixture of different acrylates and methacrylates, at ordinary or raised temperature in presence of a free-radical liberating agent as catalyst.  Catalysts specified are ultra-violet light and various peroxides, perborates, persulphates, percarbonates organometallic compounds, and hydrazine derivatives.  Additives which may also be present are detersive and pour-point depressing additives comprising metal salts of cycloaliphatic, aromatic, aromatic-aliphatic, compounds having a hydrocarbon chain of at least four carbon atoms and a salt-forming group such as -OH, -COOH, -PO4H, -PO3H, -SH, -SO3H, SO4H, and e.g. barium oleyl carbonate, barium cetyl phthalate, calcium salt of wax-substituted phenoxy - phenol, barium salt of wax-substituted and sulphated hydroxydiphenyl sulphide.  Extreme pressure additives specified are compounds of the formula:- <FORM:0708309/IV (a)/2> in which R11 is a chlorine-containing alkyl or aralkyl group, R1 is a hydrocarbon non-benzenoid group, and the Y's may be oxygen or sulphur, at least one Y being sulphur, e.g. xanthates, sulphocarbonates, trithiocarbonates, dithiocarbonates, and thiocarbonates.  Examples describe compositions of various hydrocarbon oils with various chloroform, bromoform, or carbon tetrachloride-alkylacrylate adducts.ALSO:The invention comprises hydrocarbon oils containing, as foam-inhibitors, polyhalocarboxylates of the general formula <FORM:0708309/IV (b)/1> in which X is hydrogen, chlorine, or bromine, only one X being hydrogen, R is hydrogen or methyl, Y is alkyl or alkoxyalkyl of 1-8 carbon atoms, and n is an integer of 10-50.  The polyhalocarboxylates may have a molecular weight of 2000-10,000, they may be present in an amount up to 0.1 per cent by weight, and a detersive additive and an extreme-pressure additive may also be present (see Group III).  The polyhalocarboxylates are obtained by contacting a haloform or a carbon tetrahalide with an acrylate or methacrylate containing the group -COOY or a mixture of different acrylates and methacrylates at ordinary or raised temperature in presence of a free-radical liberating agent as catalyst. Catalysts specified are ultra-violet light and various peroxides, perborates, persulphates, percarbonates, organometallic compounds, and hydrazine derivatives.  Examples describe compositions of various hydrocarbon oils with various chloroform, bromoform or carbon tetrachloridealkyl acrylate adducts.ALSO:The invention comprises hydrocarbon oils containing, as foam-inhibitors, polyhalocarboxylates of the general formula <FORM:0708309/III/1> in which X is hydrogen, chlorine, or bromine, only one X being hydrogen, R is hydrogen or methyl, Y is alkyl or alkoxyalkyl of 1-8 carbon atoms, and n is an integer of 10-50 (see Groups IV (a) and IV (b)).  The poly halocarboxylates may have a molecular weight of 2,000-10,000, they may be present in an amount up to 0.1 per cent. by weight, and a detersive additive and an extreme-pressure additive may also be present.  Additives which may also be present are detersive and pour-point depressing additives comprising metal salts of cycloaliphatic, aromatic, or aromatic-aliphatic compounds having a hydrocarbon chain of at least four carbon atoms and a salt-forming group such as -OH, -COOH, -PO4H, -PO3H, -SH, -SO3H, SO4H, and, e.g. barium oleyl carbonate, barium cetyl phthalate, calcium salt of wax-sustituted phenoxy-phenol, barium salt of wax-substituted and sulphated hydroxydiphenyl sulphide. Extreme pressure additives specified are compounds of the formula:- <FORM:0708309/III/2> in which R11 is a chlorine-containing alkyl or aralkyl group, R1 is a hydrocarbon non-benzenoid group, and the Y's may be oxygen or sulphur, at least one Y being sulphur, e.g. xanthates, sulphocarbonates, trithiocarbonates, dithiocarbonates, and thiocarbonates.  Examples describe compositions of various hydrocarbon oils with various chloroform, bromoform, or carbon tetrachloride-alkylacrylate adducts.